code: def setUp(self):
      self.data1 = pd.DataFrame(
          np.random.randint(0, 2, size=(int(1e5), 3)),
          columns=list("XYZ"),
      )
      self.data1["sum"] = self.data1.sum(axis=1)
      self.est1 = MmhcEstimator(self.data1)
  
file_path: pgmpy/pgmpy/tests/test_estimators/test_MmhcEstimator.py
imports: import unittest
  import pandas
  import numpy
  from pgmpy.estimators import MmhcEstimator, K2Score
  from pgmpy.factors.discrete import TabularCPD
label_desc: Use image node_id 1 for calling the TestMmhcEstimator obj's underlying member method code with example usage: obj.setUp() without return types